CVE-2024-54543Network attack vector

Memory corruption via WebKit out-of-bounds write

Published Jan 27, 2025 · Updated Apr 2, 2026

An out-of-bounds write in WebKit on affected Apple platforms allows remote attackers to corrupt memory via crafted web content. Apple links the flaw to WebKit Bugzilla 282450 but has not published the affected function or the unchecked write operation. Successful triggering requires the target to process attacker-controlled web content; the published consequence is memory corruption.

CVSS severity8.8
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in WebKit on affected Apple platforms allows remote attackers to corrupt memory via crafted web content. Apple links the flaw to WebKit Bugzilla 282450 but has not published the affected function or the unchecked write operation. Successful triggering requires the target to process attacker-controlled web content; the published consequence is memory corruption.

The record

CVE
CVE-2024-54543
Published
Jan 27, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <18.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.2
Apple · visionOSversion=0 <2.2
Apple · Safariversion=0 <18.2
Apple · tvOSversion=0 <18.2
Apple · macOSversion=0 <15.2
Apple · iPadOSversion=0 <17.7.6
Apple · watchOSversion=0 <11.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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